Round bar straightener-polisher machine

ABSTRACT

Round bar straightener-polisher machine of the type which has a pair of rotary rollers the lower of which is fixed while the upper of which moves at will in a vertical direction so as to determine the distance between the rollers, which distance will be occupied by the bar to be treated. On each side of the bar are corresponding lateral guides, also movable at will according to the gage of the bar, in order to avoid horizontal movement thereof. The movement of the upper roller and that of the lateral guides is controlled by a single control, for which two symetrically arranged tables which solidly support the corresponding lateral guides, turn with the center in its lower part, this turning being caused by movement of the frame of the upper roller, which transmits its movement to two yokes, one for each table and guide, each yoke being linked to a lever solidly connected to a horizontal shaft, which has respective heel-pieces or projections at its opposite ends, articulately coupled to corresponding lugs, fixed to each table. At the anterior end of one of the guides and at the posterior end of the other guide, successive small rollers, whose active areas are always in the same plane as the edges facing the lateral guides, are provided.

United States Patent 191 Brouard Madariaga [451 Apr. 22, 1975 I ROUNDBAR STRAlGl-lTENER-POLISHER MACHINE [76] Inventor: Valentin BrouardMadariaga,

Echevarri (Bilbao). Spain [22] Filed: Dec. 6, 1973 [211 App]. No.:422,204

[30] Foreign Application Priority Data Primary Examiner-Lowell A. Larsonv Attorney, Agent. or Firm-Wenderoth, Lind & Ponack ABSTRACT Round barstraightener-polisher machine of the type which has a pair of rotaryrollers the lower of which is fixed while the upper of which moves atwill in a vertical direction so as to determine the distance between therollers which distance will be occupied by the bar to be treated. Oneach side of the bar are corresponding lateral guides, also movable atwill according to the gage of the bar. in order to avoid horizontalmovement thereof. The movement of the upper roller and that of thelateral guides is controlled by a single control. for which twosymetrically arranged tables which solidly support the correspondinglateral guides, turn with the center in its lower part. this turningbeing caused by movement of the frame of the upper roller. whichtransmits its movement to two yokes, one for each table and guide, eachyoke being linked to a lever solidly connected to a horizontal shaft.which has respective heel-pieces or projections at its opposite ends,articulately coupled to corresponding lugs. fixed to each table. At theanterior end of one of the guides and at the posterior end of the otherguide. successive small rollers. whose active areas are always in thesame plane as the edges facing the lateral guides.

- are provided.

6 Claims, 8 Drawing Figures ROUND BAR STRAIGHTENER-POLISHER MACHINE Thepresent invention relates to a straightenerpolisher of round bars.

There presently exist machines of this type. which attain thestraightening and polishing of bars by sliding said bars between tworollers whose generators are cut to form a determined angle. The rollersturn and force the bar itself to slide while they subject the bar, atthe same time, to a considerable pressure. In this type of machine, thelower roller is fixed while the upper one is mounted on a framevertically displaceable along columns.

The machine in question has two guides, one on each side of the bar, tostabilize the position of same in the straightening process.

These two guides are nothing more than two parallel rulers,diametrically placed with regards the bar, and at approximate distancewith regards the diameter of same.

In well known machines, vertical movement of the upper roller isindependent of the movement of the lateral guides, whereby, when onedesires to treat a bar having dimensions different to the one previouslytreated, it is necessary to move two different controls, one for theupper roller and another for the lateral guides.

One of the objects of the present invention is to achieve automaticmovement of a single control simultaneous with the movement of the upperroller and the lateral guide.

Another object of the invention is to position two rollers at the endsnear the corners of the lateral guides in order to avoid wear of suchcorners of the guides in question.

The guides are automatically positioned, according to the diameter ofthe bar, since. by means of oscillating arches, connecting rods andbell-cranks, same are controlled by displacement of the base plate ofthe upper roller. The guide-rules are perfectly accessible and are fixedby screws which can be replaced when they are worn out and they areprotected from excessive overtaxing.

For the purpose of better understanding the expounded idea, a set ofdrawings, forming part of the specification, is hereto attached andwherein the following is represented:

FIG. I is an elevational view of an installation which centrallycomprises the straightener-polisher assembly of round bars.

FIG. 2 is a plan view of the machine illustrated in FIG. 1.

FIG. 3 is a side view of the center part of the straightener-polishcr.

FIG. 4 is a side view of the assembly by which the positioning of thelateral guides is controlled.

FIG. 5 is a plan view of the straightener-polisher machine.

FIG. 6 is a diametrical section of one of the two rollers situated atthe ends of the lateral guides.

FIG. 7 is a'schematic view wherein two rollers, upper and lower, the barbeing treated, as well as the two lateral guides, are shown.

FIG. 8 is a schematic view showing two positions for two different barsundergoing treatment.

In FIGS. 1 and 2, in which an entry and exit table for the bar to betreated, is represented, the round bar straightener-polisher assembly isreferenced I, while the groups which move the upper and lower rollers,are referenced 2 and 3, respectively.

The bar undergoing treatment is referenced 4.

The central part of the assembly, in which the straightening-polishingtreatment of the bar 4 is carried out. is shown in FIGS. 3 to 5. Twobridges or yokes which are each comprised of two vertical bars 5 and ahorizontal bar 6, linked to each other by means of corresponding fixingelements, are also shown in the above mentioned figures. In the centralzone of the horizontal bar 6. coupling of the vertical element 7, whoseheight can be regulated by means of nuts 8 or similar. at the time ofinstalling the machine. is provided.

The lower part of the member 7 is linked to a lever 10 whose end, inturn, is solidly connected to a horizontal shank 9. The ends of thishorizontal shank, one of which is situated on each side as seen in FIGS.3 and 5, have solidly connected bodies II which will be denotedheel-pieces or projections" with regards its lowcrmost part referenced12.

Such heel-pieces are linked to lugs 13 by means of shafts 14.

These lugs are solidly connected to the table 15 which turns about theshaft 16, situated in the upper part of each of the tables.

The horizontal upper part of the table 15 was referenced 1.7 and it ishere, in this part, where the corresponding guide 18 is situated, whichguide is fixed by screws or similar to the table so that when saidguides 18 are worn out by use, same could be substituted.

The structure of one of the two small rollers 19, whose precise positioncan be seen in FIGS. 4 and 5, is shown in FIG. 6. This pair of frictionrollers is solidly connected to the upper part 17 of each table 15, atits area referenced 20, which is continued slantingly towards theexterior according the shaft 21 in which the bearing 22, surrounded bythe roller 23 itself, are mounted and which corresponds to the activezone of the assembly.

FIG. 7 is a schematic view of the position of the corresponding bar,rollers and guides.

We thus observe that the roller 24 is connected to the bar 4 and theupper roller is likewise connected to the upper part ofthe bar. Oneither side ofthe bar 4, bodies which form the lateral guides 18, areprovided.

FIG. 8 schematically represents the positioning of the members whichmove when it is necessary to treat two bars of different caliber.

In the straight line position it can be seen that roller 23 drives andactuates the bar 4, in conjunction with roller 24, in such a way that itlaterally disposes of the bodies which form the guides 18 mounted on thetable 5, as is already known. In the straight line position the lug 13is driven by means of its shaft 14 at the heelpiece 12 which is dulydriven by the lever or connecting rod 10.

Should one desire to treat a bar having a bigger gage, for example asthe one referenced 4', when the roller 23 moves upwards, the entireassembly previously described, moves so as to situate itself in theposition shown with dotted lines. In this position the guide 18 is foundmore or less on the horizontal diametrical line of bar 4', and the table5' is somewhat inclined as in the case of the corresponding guide 18',the rest of the members occupying the position indicated by thediscontinued lines.

Only one of the two parts which form the straightening machine wasrepresented in this figure.

Front the aforegoing explanation of the drawings it can be deduced thatwhen the frame ofthe upper roller 23 is lowered by a single control.descent of the bridge or yoke 5-6 is effected and together with this,actuation of the lever 10, linked to the vertical member 5 in such a waythat the lever or connecting rod provokes turning of the shank 9 andconsequently the turning of members 11 and 12, in the case same pressesagainst the lugs 13 due to the fact that the heel-piece l2 and themember 13 are linked by means of the common shaft 14.

in this way. the table 15, in question, turns to a corresponding angleto duly position itself in accordance with the bar 4 to be treated.

The spherical rollers of FIG. 6 were oppositely mounted near the lateralguides 18, so as to limit as much as possible. the wear of such guidesprecisely in said zones which are mostly affected.

Presently known machines of this type do not have rollers as hereinillustrated, and therefore the corners of well known guides wear outwith great case, since such guides should in no way be constructed onthe bases of hard material as it would without any doubt, scratch thetreated bars.

On the other hand, and due to the great pressure to which the bar issubjected. when the upper and lower rollers turn to its limited supportzone in the rollers. and due to other reasons, the bar tends to movehorizontally. its friction power being more noticeable at the corners ofthe guides which wear out for this reason. before any of the otherareas.

I claim:

1. in a round bar straightener-polisher machine of the type including alower rotary roller; the vertical position of said lower roller beingfixed; an upper rotary roller positioned above said lower roller; a barto be treated being longitudinally moved in a horizontal dircctionbetween said lower and upper rollers; frame means supporting said upperroller for selectively vertically moving said upper roller toward oraway from said lower roller to accomodate between said upper and lowerrollers bars of differing diameter; a pair of lateral guide meanspositioned to contact opposite sides of a bar positioned between saidupper and lower rollers for guiding such bar during movement thereof;and means LII for selectively moving said pair of lateral guide meanstoward or away from each other to accomodate therebetween bars ofdiffering diameter; the improvement wherein:

said means for moving said lateral guide means comprises a pair of guidesupports. one each having mounted thereon one of said lateral guidemeans, said guide supports each being pivotally mounted about shaftmeans for allowing pivotal movement of said lateral guide means aboutaxes extending parallel to said horizontal direction;

and further comprising:

control means operatively connected between said frame means supportingsaid upper roller and said guide supports for transferring verticalmovement of said upper roller into pivotal movement of said lateralguide means about said axes.

2. The improvement claimed in claim 1, wherein said control meanscomprises a pair of guide movement structures, each of which isconnected to said frame means and one each of which is connected to oneof said guide supports.

3. The improvement claimed in claim 2, wherein each of said guidemovement structures comprises a yoke attached to said frame means. alever pivotally connected at one end thereof to said yoke, a horizontalshank having fixed thereto a second end of said lever, said shank havingat opposite ends thereof integral downwardly extending projections, andlugs fixed to the respective guide support and pivotally connected tosaid projections.

4. The improvement claimed in claim 1, wherein each of said guidesupports comprises a table having an upper surface, the respective saidlateral guide means being fixed to said upper surface.

5. The improvement claimed in claim 1, further comprising a pair offriction rollers, one each attached to one of said guide supports with afriction surface in alignment with the surface of the respective lateralguide means to be in contact with a bar.

6. The improvement claimed in claim 5, wherein a first of said frictionrollers is attached to a first of said guide supports at the anteriorend of said machine. taken in said horizontal direction; and a second ofsaid friction rollers is attached to a second of said guide supports atthe posterior end of said machine, taken in said horizontal direction.

1. In a round bar straightener-polisher machine of the type including alower rotary roller; the vertical position of said lower roller beingfixed; an upper rotary roller positioned above said lower roller; a barto be treated being longitudinally moved in a horizontal directionbetween said lower and upper rollers; frame means supporting said upperroller for selectively vertically moving said upper roller toward oraway from said lower roller to accomodate between said upper and lowerrollers bars of differing diameter; a pair of lateral guide meanspositioned to contact opposite sides of a bar positioned between saidupper and lower rollers for guiding such bar during movement thereof;and means for selectively moving said pair of lateral guide means towardor away from each other to accomodate therebetween bars of differingdiameter; the improvement wherein: said means for moving said lateralguide means comprises a pair of guide supports, one each having mountedthereon one of said lateral guide means, said guide supports each beingpivotally mounted about shaft means for allowing pivotal movement ofsaid lateral guide means about axes extending parallel to saidhorizontal direction; and further comprising: control means operativelyconnected between said frame means supporting said upper roller and saidguide supports for transferring vertical movement of said upper rollerinto pivotal movement of said lateral guide means about said axes.
 1. Ina round bar straightener-polisher machine of the type including a lowerrotary roller; the vertical position of said lower roller being fixed;an upper rotary roller positioned above said lower roller; a bar to betreated being longitudinally moved in a horizontal direction betweensaid lower and upper rollers; frame means supporting said upper rollerfor selectively vertically moving said upper roller toward or away fromsaid lower roller to accomodate between said upper and lower rollersbars of differing diameter; a pair of lateral guide means positioned tocontact opposite sides of a bar positioned between said upper and lowerrollers for guiding such bar during movement thereof; and means forselectively moving said pair of lateral guide means toward or away fromeach other to accomodate therebetween bars of differing diameter; theimprovement wherein: said means for moving said lateral guide meanscomprises a pair of guide supports, one each having mounted thereon oneof said lateral guide means, said guide supports each being pivotallymounted about shaft means for allowing pivotal movement of said lateralguide means about axes extending parallel to said horizontal direction;and further comprising: control means operatively connected between saidframe means supporting said upper roller and said guide supports fortransferring vertical movement of said upper roller into pivotalmovement of said lateral guide means about said axes.
 2. The improvementclaimed in claim 1, wherein said control means comprises a pair of guidemovement structures, each of which is connected to said frame means andone each of which is connected to one of said guide supports.
 3. Theimprovement claimed in claim 2, wherein each of said guide movementstructures comprises a yoke attached to said frame means, a leverpivotally connected at one end thereof to said yoke, a horizontal shankhaving fixed thereto a second end of said lever, said shank having atopposite ends thereof integral downwardly extending projections, andlugs fixed to the respective guide support and pivotally connected tosaid projections.
 4. The improvement claimed in claim 1, wherein each ofsaid guide supports comprises a table having aN upper surface, therespective said lateral guide means being fixed to said upper surface.5. The improvement claimed in claim 1, further comprising a pair offriction rollers, one each attached to one of said guide supports with afriction surface in alignment with the surface of the respective lateralguide means to be in contact with a bar.